part of flutter_muka;

class VerifyUtils {
  /// 验证手机号
  static bool isPhone(String str) {
    return new RegExp('^[1][3,4,5,6,7,8,9][0-9]{9}\$').hasMatch(str);
  }

  /// 验证身份证号
  static bool isCardId(String cardId) {
    const Map city = {
      11: "北京",
      12: "天津",
      13: "河北",
      14: "山西",
      15: "内蒙古",
      21: "辽宁",
      22: "吉林",
      23: "黑龙江 ",
      31: "上海",
      32: "江苏",
      33: "浙江",
      34: "安徽",
      35: "福建",
      36: "江西",
      37: "山东",
      41: "河南",
      42: "湖北 ",
      43: "湖南",
      44: "广东",
      45: "广西",
      46: "海南",
      50: "重庆",
      51: "四川",
      52: "贵州",
      53: "云南",
      54: "西藏 ",
      61: "陕西",
      62: "甘肃",
      63: "青海",
      64: "宁夏",
      65: "新疆",
      71: "台湾",
      81: "香港",
      82: "澳门",
      91: "国外 "
    };
    bool pass = true;

    RegExp cardReg = RegExp(r'^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$');
    if (cardId.isEmpty || !cardReg.hasMatch(cardId)) {
      pass = false;
      return pass;
    }
    if (city[int.parse(cardId.substring(0, 2))] == null) {
      pass = false;
      return pass;
    }
    // 18位身份证需要验证最后一位校验位，15位不检测了，现在也没15位的了
    if (cardId.length == 18) {
      List numList = cardId.split('');

      /// ∑(ai×Wi)(mod 11)
      /// 加权因子
      List factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];

      /// 校验位
      List parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2];
      int sum = 0;
      int ai = 0;
      int wi = 0;
      for (var i = 0; i < 17; i++) {
        ai = int.parse(numList[i]);
        wi = factor[i];
        sum += ai * wi;
      }
      if (parity[sum % 11].toString() != numList[17]) {
        pass = false;
      }
    } else {
      pass = false;
    }
    return pass;
  }
}
